/**
* postDeleteCallback.
*
* This callback takes care of deleting all translations,
* associated with the deleted content.
*/
public function postDeleteCallback(StorageEvent $event)
{
$subject = $event->getSubject();
$query = 'DELETE FROM ' . $prefix . 'translation where content_type = ? and content_type_id = ?';
$stmt = $this->app['db']->prepare($query);
$stmt->bindValue(1, $event->getArgument('contenttype'));
$stmt->bindValue(2, $subject['id']);
$stmt->execute();
}